None.
Not joking.
That iGPU is 12 years old, and it was pretty weak then. Now, that doesn't mean it can't do ANYTHING. Because, it can, but it's pretty old. Do you also have the motherboard and other hardware that goes with this CPU? If you have to buy other hardware to make this CPU useful, I would just not do that at all. Totally not worth it. Unless you want to use this for nothing more than running rather old offline software or really old games, on a really old operating system version, it is totally not worth your time to even mess with.
If it is just for fun, well, the games you can probably run are going to be games that are very light in nature and most probably need to be about five years or more old. Kind of depends on if you are only trying to use the iGPU, which, if that is the case, just going to be an exercise in frustration, or some other GPU WITH that CPU. Either way, probably not advisable unless it's only as a curiosity or hobby.